1. The Roslin Institute, University of Edinburgh, Easter Bush, United Kingdom.
2. Department of Agricultural, Food and Nutritional Science, University of Alberta, AB, Canada.
3. Department of Animal Science, Iowa State University, IA, USA.
4. College of Veterinary Medicine, Department of Pathobiology, University of Illinois Urbana-Champaign, IL, USA.
5. Vaccine and Infectious Disease Organization-International Vaccine Centre, University of Saskatchewan, Saskatoon, Canada.
6. Department of Large Animal Clinical Sciences, University of Saskatchewan, Saskatoon, Canada.